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Trying to generate a signal from two signals (EMG) that I have acquired from my NI USB

I am able to aquire two EMG signals that I am sending into a NI USB-6251 using signal express. However, I would like to generate an additional signal which is based on the two signals I've sent in. For example, I would like to show a signal in real time that takes the two signals and divides one from the other in order to show the percent contribution of each signal.
 
How would I go about doing this?
 
Thank you
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You should be able to use the Arithmetic Step (Add Step Button under Processing\Analog Signals) to divide the signals and then use that output as the input signal for a DAQmx Generate Step.  If you want to just view the divided signals you can display the result of the Arithmetic on the Data View by dragging the output of the Arithmetic Step to the Data View.

 

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